diff --git a/scripts/test.sh b/scripts/test.sh
index fc8c9019..29440257 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -176,8 +176,7 @@ case "$TARGET" in
 "node")
   download_server
   start_server
-  bash "$SRCROOT/scripts/download-core.sh"
-  npm install --build-from-source --realm_enable_sync
+  npm install --build-from-source
 
   # Change to a temp directory.
   cd "$(mktemp -q -d -t realm.node.XXXXXX)"
diff --git a/src/node/gyp/realm.gyp b/src/node/gyp/realm.gyp
index 2472ff5f..f1e42955 100644
--- a/src/node/gyp/realm.gyp
+++ b/src/node/gyp/realm.gyp
@@ -1,8 +1,18 @@
 {
   "variables": {
-    "use_realm_debug": "<!(echo $REALMJS_USE_DEBUG_CORE)",
-    "realm_enable_sync%": "0"
+    "use_realm_debug": "<!(echo $REALMJS_USE_DEBUG_CORE)"
   },
+  "conditions": [
+    ["OS=='mac'", {
+      "variables": {
+        "realm_enable_sync%": "1"
+      }
+    }, {
+      "variables": {
+        "realm_enable_sync%": "0"
+      }
+    }]
+  ],
   "targets": [
     {
       "target_name": "realm-core",
@@ -72,6 +82,14 @@
       },
       "target_name": "vendored-realm",
       "type": "none",
+      "actions": [
+        {
+          "action_name": "download-realm",
+           "inputs": [ ],
+           "outputs": [ "<(module_root_dir)/vendor/core-node" ],
+           "action": [ "<(module_root_dir)/scripts/download-core.sh", "node" ]
+        }
+      ],
       "conditions": [
         ["realm_enable_sync", {
           "all_dependent_settings": {
@@ -83,14 +101,7 @@
             "include_dirs": [ "<(module_root_dir)/vendor/core-node/include" ],
             "library_dirs": [ "<(module_root_dir)/vendor/core-node" ]
           },
-          "actions": [
-            {
-              "action_name": "download-realm",
-               "inputs": [ ],
-               "outputs": [ "<(module_root_dir)/vendor/core-node" ],
-               "action": [ "<(module_root_dir)/scripts/download-core.sh", "node" ]
-            }
-          ]
+
         }]
       ]